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Old 11-01-2012, 07:20 PM   #1
rpepka

 
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Roto Fab NO-TUNE Air Intake CLOSED?

Could anyone explain why the thread is closed?
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Old 11-01-2012, 09:13 PM   #2
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Could anyone explain why the thread is closed?
I can't!
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Old 11-02-2012, 12:17 AM   #3
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???
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Old 11-02-2012, 03:55 AM   #4
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I was thinking the same thing I didn't see anything that was inappropriate but then again they may have removed it so I could be wrong.
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Old 11-02-2012, 06:22 AM   #5
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Yea, I saw it was closed yesterday, read all the comments and was baffled as to why it was closed. BTW, I'll be ordering one for my Dad for Christmas. No tune required, no CEL right?
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Old 11-02-2012, 07:55 AM   #6
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Roto Fab NO-TUNE Air Intake

Can someone please explain to me why a "no-tune" intake is desireable on a Camaro ZL1? I thought the logic was that if you greatly increased air intake (by adding an aftermarket CAI), then you had to upload a program that increased fuel appropriately across the rev range in order to avoid running too lean and causing detonation. And any CAI which does not require a re-tune would not increase airflow enough to risk running lean would not increase airflow enough to increase horsepower very much. Is the LSA engine immune to this logic? Does the onboard computer sense the increased airflow and automatically compensate for it by adding fuel? If not, it seems to me that knock sensors would cause activation of the "limp home" mode.
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Old 11-02-2012, 08:50 AM   #7
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Originally Posted by littlecammi View Post
Can someone please explain to me why a "no-tune" intake is desireable on a Camaro ZL1? I thought the logic was that if you greatly increased air intake (by adding an aftermarket CAI), then you had to upload a program that increased fuel appropriately across the rev range in order to avoid running too lean and causing detonation. And any CAI which does not require a re-tune would not increase airflow enough to risk running lean would not increase airflow enough to increase horsepower very much. Is the LSA engine immune to this logic? Does the onboard computer sense the increased airflow and automatically compensate for it by adding fuel? If not, it seems to me that knock sensors would cause activation of the "limp home" mode.
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Old 11-02-2012, 10:45 AM   #8
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Originally Posted by littlecammi View Post
Can someone please explain to me why a "no-tune" intake is desireable on a Camaro ZL1? I thought the logic was that if you greatly increased air intake (by adding an aftermarket CAI), then you had to upload a program that increased fuel appropriately across the rev range in order to avoid running too lean and causing detonation. And any CAI which does not require a re-tune would not increase airflow enough to risk running lean would not increase airflow enough to increase horsepower very much. Is the LSA engine immune to this logic? Does the onboard computer sense the increased airflow and automatically compensate for it by adding fuel? If not, it seems to me that knock sensors would cause activation of the "limp home" mode.
It seems as if GM may have left a little wiggle room in the ECU to compensate. This would justify why Ted Janetty (Jannetty Racing) is able to add a 10% OD pulley, and add 50rwhp without a tune needed.
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Old 11-02-2012, 10:56 AM   #9
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It does seem reasonable. I talked to some other manufacturers of CAI's and was told that a tune was not needed for their intakes as well. Almost just seemed too good to be true.
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